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      1 /*	$NetBSD: nouveau_nvif_fifo.c,v 1.2 2021/12/18 23:45:33 riastradh Exp $	*/
      2 
      3 /*
      4  * Copyright 2018 Red Hat Inc.
      5  *
      6  * Permission is hereby granted, free of charge, to any person obtaining a
      7  * copy of this software and associated documentation files (the "Software"),
      8  * to deal in the Software without restriction, including without limitation
      9  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
     10  * and/or sell copies of the Software, and to permit persons to whom the
     11  * Software is furnished to do so, subject to the following conditions:
     12  *
     13  * The above copyright notice and this permission notice shall be included in
     14  * all copies or substantial portions of the Software.
     15  *
     16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
     17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
     18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
     19  * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
     20  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
     21  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
     22  * OTHER DEALINGS IN THE SOFTWARE.
     23  */
     24 #include <sys/cdefs.h>
     25 __KERNEL_RCSID(0, "$NetBSD: nouveau_nvif_fifo.c,v 1.2 2021/12/18 23:45:33 riastradh Exp $");
     26 
     27 #include <nvif/fifo.h>
     28 
     29 static int
     30 nvif_fifo_runlists(struct nvif_device *device)
     31 {
     32 	struct nvif_object *object = &device->object;
     33 	struct {
     34 		struct nv_device_info_v1 m;
     35 		struct {
     36 			struct nv_device_info_v1_data runlists;
     37 			struct nv_device_info_v1_data runlist[64];
     38 		} v;
     39 	} *a;
     40 	int ret, i;
     41 
     42 	if (device->runlist)
     43 		return 0;
     44 
     45 	if (!(a = kmalloc(sizeof(*a), GFP_KERNEL)))
     46 		return -ENOMEM;
     47 	a->m.version = 1;
     48 	a->m.count = sizeof(a->v) / sizeof(a->v.runlists);
     49 	a->v.runlists.mthd = NV_DEVICE_FIFO_RUNLISTS;
     50 	for (i = 0; i < ARRAY_SIZE(a->v.runlist); i++)
     51 		a->v.runlist[i].mthd = NV_DEVICE_FIFO_RUNLIST_ENGINES(i);
     52 
     53 	ret = nvif_object_mthd(object, NV_DEVICE_V0_INFO, a, sizeof(*a));
     54 	if (ret)
     55 		goto done;
     56 
     57 	device->runlists = fls64(a->v.runlists.data);
     58 	device->runlist = kcalloc(device->runlists, sizeof(*device->runlist),
     59 				  GFP_KERNEL);
     60 	if (!device->runlist) {
     61 		ret = -ENOMEM;
     62 		goto done;
     63 	}
     64 
     65 	for (i = 0; i < device->runlists; i++) {
     66 		if (a->v.runlists.data & BIT_ULL(i))
     67 			device->runlist[i].engines = a->v.runlist[i].data;
     68 	}
     69 
     70 done:
     71 	kfree(a);
     72 	return ret;
     73 }
     74 
     75 u64
     76 nvif_fifo_runlist(struct nvif_device *device, u64 engine)
     77 {
     78 	struct nvif_object *object = &device->object;
     79 	struct {
     80 		struct nv_device_info_v1 m;
     81 		struct {
     82 			struct nv_device_info_v1_data engine;
     83 		} v;
     84 	} a = {
     85 		.m.version = 1,
     86 		.m.count = sizeof(a.v) / sizeof(a.v.engine),
     87 		.v.engine.mthd = engine,
     88 	};
     89 	u64 runm = 0;
     90 	int ret, i;
     91 
     92 	if ((ret = nvif_fifo_runlists(device)))
     93 		return runm;
     94 
     95 	ret = nvif_object_mthd(object, NV_DEVICE_V0_INFO, &a, sizeof(a));
     96 	if (ret == 0) {
     97 		for (i = 0; i < device->runlists; i++) {
     98 			if (device->runlist[i].engines & a.v.engine.data)
     99 				runm |= BIT_ULL(i);
    100 		}
    101 	}
    102 
    103 	return runm;
    104 }
    105